1. Key Laboratory of Animal Genetic, College of Animal Science and Technology, Breeding and Reproduction in Shaanxi Province, Northwestern A&F University, Xianyang 712100, China
2. Centre de Recherche en Reproduction et Fertilité, Faculté de Médecine Vétérinaire, Université de Montréal, St-Hyacinthe, QC J2S 7E4, Canada
3. State Key Laboratory for Sheep Genetic Improvement and Healthy Production/Institute of Animal Husbandry and Veterinary Medicine, Xinjiang Academy of Agricultural and Reclamation Sciences, Shihezi 832000, China